Sprint's Spark Phones Don't Support Simultaneous Voice/Data
Replying to: LOLZ by Versed
Unnecessarily harsh comment. The technology for 4G to 3G fallback *today* for the CDMA / LTE carriers such as Sprint and Verizon does not make this easy for them. So, yes, AT&T and T-Mobile have an advantage for the moment. Early LTE devices on Sprint and Verizon (and US Cellular and MetroPCS, etc., too) could not do simultaneous voice and data either.
Sprint's Spark is stressful on the compute power and processing on the current-generation of radios in the devices, so it is not surprising that the first version of Spark devices do not allow simultaneous voice and data. And the data performance advantage of Spark - available sooner than LTE Advanced from the others - is innovative. Early teething pains are likely ... just like the early LTE problems experienced by Verizon when they began service.
Also, remember that the need for simultaneous voice and data is somewhat over-rated - not a common scenario for most use. Second, this will change in the near future when more powerful phones are available, and combined with VoLTE (Voice over LTE) which all the carriers will get to, will remove this issue (and disparity to the 3GPP guys as AT&T and T-Mobile) entirely.
Finally, your disparage of the Sprint effort to acquire T-Mobile is unconnected to what this discussion is about. That effort - on its *own* merits - is a Good Thing. We have two strong (with more than 110 Million devices) and two weak carriers (each with 50 to 55 Million devices) in the US. Too many chances for the big two to screw around with us. We need a stronger third carrier - which would be after a Sprint T-Mobile merger - not two weaker ones.